Yes, if you add a V8, you are changing the steering system, probably adding IFS, and disc brakes. Very very expensive. I just watched an AD last Wednesday hammer for $32,000 with a 261 engine and no mods, just a nice clean frame up resto. Its our time as far as AD's go, but going overboard really doesn't bring any more money. In fact, the resto mods can bring less. Another AD the same day with a 350 went for $18,500. Hated to see that. People aren't buying all the hard work and money you put in. Its not what makes sense to you, it what makes sense to the buyer. Once you chop the frame up to add IFS and V8 mounts, you took away most of the trucks character. Not what I think, the way it just IS.